Product Description

Overview

The Bently Nevada 135137-01 is a rear-mounted Position Input/Output (I/O) module designed for the 3500/45 Position Monitor. This module provides direct wiring access through internal terminations, enabling a compact, reliable connection between field sensors and the 3500 rack backplane. It is compatible with a wide range of displacement and position sensors, including Proximitor® probes, rotary position transducers, LVDTs, and potentiometers.

Key Features and Advantages

Flexible Position Monitoring

• Measures axial shaft displacement, differential expansion, valve position, and machine case growth

• Supports critical mechanical monitoring applications in turbines, compressors, and other rotating machinery

Multi-Channel Signal Conditioning

• Four channels configurable independently or in pairs

• Converts raw transducer signals into standardized digital data for the 3500/45 monitor

• Provides high accuracy, typically within ±0.33% of full scale

Industrial Reliability

• Operating temperature range: -30°C to +65°C (-22°F to +150°F)

• Update rate of 100 ms or faster for rapid detection of mechanical changes

• Designed for continuous use in harsh environments such as power generation or process facilities

Simplified Installation and Maintenance

• Internal terminations reduce external wiring complexity and minimize connection points

• Enhances signal integrity and simplifies troubleshooting during routine maintenance

Technical Specifications

Applications

• Axial thrust monitoring on rotating machinery

• Differential expansion measurements in turbines and generators

• Valve position tracking in steam, gas, or fuel systems

• Machine case thermal growth and displacement monitoring

FAQ

Q: Can this module replace an external termination I/O module?
A: Yes, but field wiring must be redirected to the rear-mounted terminals.

Q: What sensors are supported?
A: Proximitor®, AC/DC LVDTs, rotary position transducers, and potentiometers.

Q: How accurate is the position measurement?
A: Typically ±0.33% of full scale, depending on the sensor type.

Q: Is it suitable for extreme industrial environments?
A: Yes, it operates reliably from -30°C to +65°C and supports high humidity up to 95% non-condensing.